Small Signal Stability of DFIG Connected Power System and Identification of Oscillatory Modes Using Prony Analysis
This paper investigates the impact of wind power on small signal stability of power system using parameters like; wind power penetration level and Doubly Fed Induction Generator (DFIG) voltage controller gain. The impact of wind penetration has been analysed by replacing conventional synchronous generator with DFIG based wind turbines. For this purpose, standard IEEE 14 Bus system has been selected. Time tested modal analysis has been used to compute the oscillatory modes that occur due to small disturbances. Further, the identification of low frequency oscillations has been done using prony analysis. Prony analysis has been performed in time as well as in frequency domain, and used for extracting hidden frequency information from the waveform of the signal.
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